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yisrael012332

  • one year ago

Evaluate the following expression using the values given: Find 4x - y - 2z if x = -2, y = 3, and z = -2 HELP HELP HELP

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  1. yisrael012332
    • one year ago
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    @ganeshie8

  2. yisrael012332
    • one year ago
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    @Hero

  3. yisrael012332
    • one year ago
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    @HWBUSTER00

  4. yisrael012332
    • one year ago
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    @dan815

  5. yisrael012332
    • one year ago
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    @dan815

  6. yisrael012332
    • one year ago
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    @princeharryyy

  7. yisrael012332
    • one year ago
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  8. yisrael012332
    • one year ago
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    @Michele_Laino

  9. yisrael012332
    • one year ago
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    @Nnesha

  10. anonymous
    • one year ago
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    Just substitute the numbers given to you into the equation.

  11. anonymous
    • one year ago
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    \[4(-2)-(3)-2(-2)\]

  12. yisrael012332
    • one year ago
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    TY IS -7

  13. yisrael012332
    • one year ago
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    ITs##

  14. yisrael012332
    • one year ago
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    can you help with another

  15. yisrael012332
    • one year ago
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    The radius of a cone-shaped tank is 4 feet less than its height. If the height of the tank is (x - 3) feet, the expression below shows the volume of the tank: 1 over 3π(x - 7)2 (x - 3) What does the factor π (x - 7)2 represent?

  16. yisrael012332
    • one year ago
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    u have no clue'

  17. yisrael012332
    • one year ago
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    i

  18. DanJS
    • one year ago
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    Radius is 4 less than the height... write that as it reads, 'is' means equals r = h - 4

  19. DanJS
    • one year ago
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    Height is (x-3) h = x - 3

  20. yisrael012332
    • one year ago
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    The total surface area of the tank The area of the curved sides of the tank The area of the circular base of the tank The area of the base of about three such tanks

  21. yisrael012332
    • one year ago
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    so would it be the 3ed one

  22. DanJS
    • one year ago
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    The volume of a Cone is \[V = \frac{ 1 }{ 3 }\pi*r^2*h\]

  23. princeharryyy
    • one year ago
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    insert in the values and solve

  24. DanJS
    • one year ago
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    The radius is measured from the wide base of the cone

  25. yisrael012332
    • one year ago
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    oh ok so d

  26. DanJS
    • one year ago
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    If the radius is height minus 4 and the height is x - 3 r = h - 4 h = x - 3 sub in h for the radius r = (x-3) - 4 = x - 7

  27. DanJS
    • one year ago
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    They want to know what pi*(x-7)^2 represents... in other words now that you have r = x - 7 the question is , what is pi*r^2

  28. yisrael012332
    • one year ago
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    you lost me

  29. DanJS
    • one year ago
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    ok, the givens in the problem are, r = h -4 (radius is 4 less than height) h = x - 3 (height is x - 3

  30. DanJS
    • one year ago
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    you get that part?

  31. yisrael012332
    • one year ago
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    yea

  32. DanJS
    • one year ago
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    To combine those two, you can take the h = x - 3, and insert that into the radius r = h - 4 = (x-3) - 4 r = x - 7 so the radius is in terms of X now, not the height

  33. DanJS
    • one year ago
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    good?

  34. yisrael012332
    • one year ago
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    no

  35. DanJS
    • one year ago
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    The radius is given in terms of the height of the cone... the height is given in terms of a measurememt X... is is one of those compound functions like.. r [ h(x)] You use the height value in the radius , to get r(x), the radius in terms of the measure X instead of height h

  36. yisrael012332
    • one year ago
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    i understand but What does the factor π (x - 7)2 represent

  37. yisrael012332
    • one year ago
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    i understand how you solved it but how doo i answer the question

  38. DanJS
    • one year ago
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    The volume of a cone is \[V = \frac{ 1 }{ 3 }\pi*r^2*h\]

  39. DanJS
    • one year ago
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    recall, the area of a circle is A = pi*r^2 So the Volume of the cone is, 1/3 * ( area of circle base) * (height)

  40. yisrael012332
    • one year ago
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    yea ok

  41. DanJS
    • one year ago
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    pi times the radius squared is the area of the base in this instance

  42. yisrael012332
    • one year ago
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    so its c

  43. yisrael012332
    • one year ago
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    like i said

  44. DanJS
    • one year ago
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    \[V = \frac{ 1 }{ 3 }\pi*r^2*h = (area ~base)*\frac{ height }{ 3 }\]

  45. DanJS
    • one year ago
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    i didnt look at the answers

  46. yisrael012332
    • one year ago
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    The total surface area of the tank The area of the curved sides of the tank The area of the circular base of the tank The area of the base of about three such tanks

  47. yisrael012332
    • one year ago
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    i understand the problem no but i wanted to clarify

  48. DanJS
    • one year ago
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    a, right on, yeah C

  49. yisrael012332
    • one year ago
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    tytytytytyty so much

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